All of you were irritated with a groups that doesn’t interest you. One of the dangerous spam systems lately is Facebook Antivirus. After installation, it will automaticly tag ALL your friends and post that photo on your wall.
This scam application is new and will be deleted soon by Facebook, but it will be good to slow down spread to more accounts.
This looks like this:

There can be also seen that this application is fake because weird number instead name of application: http://apps.facebook.com/kxetyegpgkxdwfy/. If you did install this application already, don’t worry. Open your photo that application installed on your wall and untag yourself and photo
will be automaticly removed from your photos.
Currently Facebook team is working on this issue so expect little unexpected changes in this application. Soon it will be hopefully removed. Take care and enjoy!
Mother of god..